William huston



(Model.)

W. HUSTON. l

-E'JBGTOR.

Patented Sept. 11,1883.

Yraras;

Arabia rrrcn.

VILLIAM HUSTON, OF VILMINGTON, DELAVARE, ASSIGNOB OF ONE-HALF TO HENRY N. VIOKERSHAM, OF SAME PLACE.

EJ Ec'ro R.

SPELIFICATION forming part of Letters Patent-No. 284,962, dated September 11., 1883.

Application filed May 7, 1883. (Model.)

To all whom it may concern.'

ing to the Huid under pressure, or aportion of o Be it known that I, WILLIAM IIUsToN,-a it, a whirling motion as itY rushes through the citizen of the United States, and a resident of Vilmington, Delaware, have invented certain 5 Improvementsin'Ejectors, of whichthefollowing is a specification. My invention consists, mainly, in increasing the efficacy of ejectors by causing the iluidl under pressure to deviate from a direct course Io as it passes into the discharge-passagebetween the end of the latter and the end of .the suction-passage, as explained hereinafter. y

In the accompanying drawings, Figure' l is a section of an ejector by which my invention I 5 is carried into effect; Fig. 2, a section of part of the ejector; Fig. 3, an inverted plan view of the tube, Fig. 2; Fig. 4, a diagram illustrating my invention, and Fig. 5 an llustraf tion of the application of the ejector to the 2o increasing of the draft in a chimney.

It should be understood in the outset that I do not desire to restrict myself to any particular-mode of constructing the ejector, the views, Figs. 1, 2, 3, giving an example of a simple 2 5 device by which my invention may be carried into effect.

There is a chest or casing, A, in one end of which is the inlet or suction opening, a, sur-A rounded by an annular rib, b, beveled on the 3o outside. A tube, B, projects into the chest, the interior of this tube forming the dischargepassage d, and within the chest isthe annular receiving-chamber e, to which any iiuid under pressure is admitted.

Between the annular rib b and the end of the tube d is an annular tapering passage, h, which forms a communication between the receiving-chamber and discharge-passage, the suction-passage a terminating and the discharge-pipe commencing at this communication h.

I make no general claim to the above-described parts, the main feature of my invention consisting in causing the fluid under pressure, or a portion of that iiuid, to deviate from a direct course as it enters lthe discharge-passage d. This is accomplished in the device by forming inclined notches x in the inner beveled end of the tube B, these notches impartdischarge-passage, the induced iluid entering at the inlet orsuction opening. Substantially the same effect will be produced by forming inclined grooves or notches on the annular rib b at the point where4 the communication 7L occurs between the receiving-chamber and discharge-passage; or both the rib and beveled end of the tube may be notched.

The difference between the action of the fluid under pressure in an ordinary ejector andthat of the iluid in the improved ejector may be further explained by reference to the diagram Fig. 4. In the one case the fluid has a tendency to take a comparatively direct course, as indicated by the arrows 2 in the said diagram, whereas such of the fluid under pressure as may come under the iniiuence of the inclined notches will deviate laterally and pursue the whirling course indicated by the' arrows l.

Should the end of the tube B be adjusted so as to bear against the annular rib b, there will be no communication between the receivingchamber and discharge passage, excepting through a series of orifices formed by the inclined notches, and all the fluid under pressure will have a whirling course imparted to it; but when there is an annular communication between the receiving-chamber and discharge-passage, as in the drawings, a portion only of the fluid will come under the influence of the inclined notches and will deviate laterally from a direct course, the remaining iiuid pursuing a comparatively direct course. I have found by many and long continued tests, and by comparison with other ej ectors, that by thus causing the fluid under pressure, or a portion of it to deviate laterally as it is entering the discharge-passage d, a much better effect is produced than by the ordinary ejector. Vithout attempting to give positive philosophical reasons for this result, I may state that in testing the instrument of which the drawings are an exact representation, by introducing steam under pressure into the receiving-chamber while the instrument was exposed above and below, part of the steam escaped from the discharge-passage in a direct course,

but the greater portion in widely-diffused whirling volumes, and that the exhausting effeet at the suction-opening was much more powerful than in ordinary ejectors, even when a very small amount of steam was used. In

It will be unnecessary to enumerate the many uses to which my improved ejector may be applied. It will sufice to say that it maybe used as other ejectors are used whenever it is desirable to put in motion any fluid, elastic or non-elastic, by another fluid, elastic or nonelastic, and under pressure. I may, however, refer to one application of my invention. Vhen the ejector was placed in a tube, W, to test its `capacity for increasing the draft of a chimney, it was found to be more effective than an ordinary ejector, owing, doubtless, to the escape laterally of widely-diffused*whirling volumes of steam. This vapplication of the invention is shown on a reduced scale in Fig. 5. As shown in `the drawings, the dis chargepassage increases in diameter from about the point w, Fig. 2, to the outlet end.

It should be understood that the main feature of my invention is restricted to the mode of causing` iuid under pressure to deviate from a direct course in an ejector at the point illustrated and described to bring about the desired result. Steam has been introduced in whirling jets into the body of an ejector at a diierent point, as in the Patent No. 159,256, granted February 2, 1875.

I claim as my invention 1. The mode herein described of increasing the'efciency of ejectors, the said mode consisting in causing the fluid under pressure, or part thereof, to deviate from a'direet course laterally, as it passes inward through the annular communication between an outer steamchamber and the discharge-passage, substantially as set forth.

2. 'Ihe combination, in an ejector, of the outer chest or casing, A, the tube B, forming the discharge-chamber, the rib d, forming the termination .of the suction-passage, with in; clined grooves in the end of the said tube, or

in the rib where the annular tapering passage forms a communication between the said chest and discharge-tube, substantially asspecifed.

In testimony whereof I have signed my name to this speciication in the presence of two subseribing witnesses.

VILLIAM HUSTON. XVitnesses:

HENRY IIowsoN, .I r., HARRY SMITH. 

